A model of severely atrophic mandible is modified with wax to a desired postoperative ridge form. An extended surgical splint is produced from clear acrylic resin.
After completion of the subperiosteal tunnel dissection, the surgical splint is fixed to the mandible with circummandibular ligatures. Hydroxyapatite particles are injected into the tunnel.
This method can prevent migration of hydroxyapatite particles and reduce extension of the alveolar ridge.